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<A href="introduction6.htm">Debugging Tools for Windows (WinDbg, KD, CDB, NTSD)</A> &gt; <A href="debugger_reference.htm">Debugger Reference</A> &gt; <A href="debugger_commands.htm">Debugger Commands</A> &gt; <A href="specialized_extensions.htm">Specialized Extension Commands</A> &gt; <A href="usb_3_extensions.htm">USB 3.0 Extensions</A> &gt; </div>
	<div id="winchm_template_title">!usb3kd.device_info</div>
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	<div id="winchm_template_content"><div id="mainSection"><p>The  <b>!usb3kd.device_info</b> command displays information about a USB device in the <a href="#Bookmark2525">USB 3.0 tree</a>.</p>
<pre class="syntax"><b>!usb3kd.device_info </b><i>DeviceContext</i></pre>
<h2><a id="ddk__devobj_dbg"></a><a id="DDK__DEVOBJ_DBG"></a>Parameters</h2>
<p></p>
<dl>
<dt><a id="_______DeviceContext______"></a><a id="_______devicecontext______"></a><a id="_______DEVICECONTEXT______"></a>       <i>DeviceContext</i>      </dt>
<dd>
<p>Address of the _DEVICE_CONTEXT structure that represents the device.</p>
</dd>
</dl>
<h2><a id="DLL"></a><a id="dll"></a>DLL</h2>
<p>Usb3kd.dll
     </p>
<h2>Remarks</h2>
<p><b>!device_info</b> and <a href="#Bookmark2534"><b>!ucx_device</b></a> both display information about a device, but the information displayed is different. The output of <b>!device_info</b> is from the point of view of the USB 3.0 hub driver, and the output of <b>!ucx_device</b> is from the point of view of the USB host controller extension driver. For example, the <b>!device_info</b> output includes information about configuration and interface descriptors, and <b>!ucx_device</b> output includes information about endpoints.</p>
<h2>Examples</h2>
<p>You can obtain the address of the device context structure by looking at the output of the <a href="#Bookmark2540"><b>!usb_tree</b></a> command. In the following example, the address of the device context structure is 0xfffffa8005abd0c0.</p>
<div class="code"><span codelanguage="cmd"><table>
<tr>
<th>cmd</th>
</tr>
<tr>
<td>
<pre>3: kd&gt; !usb_tree

Dumping HUB Tree - !drvObj 0xfffffa800597f770
--------------------------------------------

Topology
--------
1)  !xhci_info 0xfffffa80051d1940  ... - PCI: VendorId ...
    !hub_info 0xfffffa8005ad92d0 (ROOT)
    ...
Enumerated Device List
----------------------
...

2) !device_info 0xfffffa8005abd0c0, !devstack fffffa80059c3800
    Current Device State: ConfiguredInD0
    Desc: ... USB Flash Drive
    ...</pre>
</td>
</tr>
</table></span></div>
<p>Now you can pass the address of the device context to the <b>!device_info</b> command.</p>
<div class="code"><span codelanguage="cmd"><table>
<tr>
<th>cmd</th>
</tr>
<tr>
<td>
<pre>3: kd&gt; !device_info 0xfffffa8005abd0c0

Dumping Device Information fffffa8005abd0c0
-------------------------------------------
dt USBHUB3!_DEVICE_CONTEXT 0xfffffa8005abd0c0
dt USBHUB3!_HUB_PDO_CONTEXT 0xfffffa8005b118d0
!idle_info 0xfffffa8005b11920 (dt USBHUB3!_ISM_CONTEXT 0xfffffa8005b11920)
Parent !hub_info 0xfffffa8005ad92d0 (dt USBHUB3!_HUB_FDO_CONTEXT 0xfffffa8005ad92d0)
!port_info 0xfffffa8005abe0c0 (dt USBHUB3!_PORT_CONTEXT 0xfffffa8005abe0c0)
!ucx_device 0xfffffa8005992840 !xhci_deviceslots 0xfffffa80051d1940 1

LPMState: U1IsEnabledForUpStreamPort U2IsEnabledForUpStreamPort U1Timeout: 38, U2Timeout: 3
DeviceFlags: HasContainerId NoBOSContainerId Removable HasSerialNumber MsOsDescriptorNotSupported NoWakeUpSupport DeviceIsSuperSpeedCapable 
DeviceHackFlags: WillDisableOnSoftRemove SkipSetIsochDelay WillResetOnResumeS0 DisableOnSoftRemove 

Descriptors:
dt _USB_CONFIGURATION_DESCRIPTOR 0xfffffa80053f9250
dt _USB_INTERFACE_DESCRIPTOR 0xfffffa80053f9259
ProductId: ... Flash Drive
DeviceDescriptor: VID ... PID ... REV 0a00,  Class: (0)(0) BcdUsb: 0300

UcxRequest: !wdfrequest 0x57ffa662948, 
ControlRequest: !wdfrequest 0x57ffa667798, !irp 0xfffffa8005997650 !urb 0xfffffa8005abd1c0, NumberOfBytes 0
Device working at SuperSpeed
Current Device State: ConfiguredInD0

Device State History: &lt;Event&gt; NewState (&lt;Operation&gt;(),..) :

    [16] &lt;Yes&gt; ConfiguredInD0
    ...
Device Event History:
    [10] TransferSuccess
    ...</pre>
</td>
</tr>
</table></span></div>
<h2><a id="see_also"></a>See also</h2>
<dl>
<dt><a href="#Bookmark2525">USB 3.0 Extensions</a></dt>
<dt><a href="#Bookmark2529"><b>!usb3kd.device_info_from_pdo</b></a></dt>
<dt><a href="http://go.microsoft.com/fwlink/p?LinkID=227351">Universal Serial Bus (USB) Drivers</a></dt></dl></div></div>	
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